Open in emptyMovieClip

1

I’ve been trying to open the mail.swf on top of the mainpage. But what this code does is removing the mainpage and showing the mail.swf instead. i thought it would open in the mail_mc in the mainpage?

onClipEvent (enterFrame) {
	if (_root.btn_3, hitTest(_root.head)) {
		_root.createEmptyMovieClip("mail_mc", 1);
		_root.loadMovie("mail.swf", "mail_mc")
		_root.mail_mc._x=400;
		_root.mail_mc._y=300; 
		
	} else {
		unloadMovie(_root.mail_mc);
	}
}